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1) Automatically as predefined system Mimic Gradual Sunrise, Sunset (24hours), Luner Cycle (28days).
They can completely imitate the change of light in nature: The white lights turn gradually bright at dawn and turn gradually dark at dusk when the blue lights turn bright and only moonlight blue is left at midnight . The LEDs can even imitate the lunar cycle, which ensures better growth of your pets in this mimic nature light. Moreover, it can work normally even when you take a long time leave.